My Foxycart Validation using JQuery

<script language="javascript">

// are these needed?
var size = "";
var color = "";

//run this from the jquery function below
function fc_PreProcess(color, size) {

//clear error_string
var	error_string = "";

if (color == "") {	 error_string = error_string + "You must select a color.\n";	 }
if (size == "") {	 error_string = error_string + "You must select a size.\n";	 }

if (size == "" || color == "") {
alert(error_string);
return false;
} else {
return true;
}
}

$j(function() {

//run validation on forms with submit (if some products dont need this validation, you can give them a different class name)
$j('.submit').bind('click', function() {

//first drop-down item
var size = $j(this).parents("form:first").find("select:eq(0)").val();
//second drop down item
var color = $j(this).parents("form:first").find("select:eq(1)").val();

//run fc_PreProcess
fc_PreProcess(color, size);
if (size == "" || color == "") {
//do not submit the form
return false;
}
});
</script>